Mahabharata 7.102.49

सोऽद्य यत्तो रणे पार्थं परिरक्ष युधिष्ठिरम्एतद्धि सर्वकार्याणां परमं कृत्यमाहवे

so'dya yatto raṇe pārthaṃ parirakṣa yudhiṣṭhirametaddhi sarvakāryāṇāṃ paramaṃ kṛtyamāhave

Our plain-language meaning of this verse is waiting for scholar review.